I'm still trying to get my HOTAS set up,, so not takeoffs and landings as yet. I've had a bit of a flyaround and strafed a few buildings and the terrain.
some quick observatrions.
The cockpit reflections in the canopy are really well done. Mirrors work and reflections of the polished airframe are great.
Sound is good except you can hear your rounds striking the water at a distance.
I'm not sure if I've been flying in a particularly flat area but I like the Cliffs of Dover terrain and water better. And the scale of buildings feels a bit too small. (maybe I just have to fly lower?

)
I think I like the 'feeling of flight' better in Cliffs of dover too. In the DCS Mustang I get the feeling like I'm back in Janes WWII fighters. Also I haven't been able to find any documentation likes a pilots manual.
Not sure if it's just me but the cockpit instruments are a little bit blurry for me (even used my glasses!) and the white text on the cockpit writing and outlining strobes, not sure if it's an antialiasing issue.
It will be good to see how the beta evolves. Hope they let us merge our A10 and black shark installations!
Cheers!